diff options
Diffstat (limited to 'test/test_weather.lua')
| -rw-r--r-- | test/test_weather.lua | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/test/test_weather.lua b/test/test_weather.lua index e18aa15..1d35748 100644 --- a/test/test_weather.lua +++ b/test/test_weather.lua @@ -127,4 +127,30 @@ assert(weather.arrow(0) == '\u{2193}', 'a north wind blows southward') assert(weather.arrow(180) == '\u{2191}', 'a south wind blows northward') assert(weather.arrow(nil) == '', 'no direction draws nothing') +-- === Sun position ========================================================= +-- t is the fraction of daylight elapsed, and the widget uses it to place the +-- dot along the arc. Sunrise 1000, sunset 2000, so midday is 1500. +assert(weather.sun_t(1000, 1000, 2000) == 0, 'at sunrise t is 0') +assert(weather.sun_t(1500, 1000, 2000) == 0.5, 'at midday t is half') +assert(weather.sun_t(2000, 1000, 2000) == 1, 'at sunset t is 1') + +-- OWM reports today's sunrise and sunset, so between midnight and sunrise the +-- numerator is negative. The clamp is the whole handling; without it the dot +-- would be drawn off the left end of the arc. +assert(weather.sun_t(500, 1000, 2000) == 0, 'before dawn clamps to 0') +assert(weather.sun_t(9999, 1000, 2000) == 1, 'after dusk clamps to 1') + +-- Degenerate input must not divide by zero. +assert(weather.sun_t(1500, 2000, 2000) == 0, 'zero-length day gives 0, not nan') +assert(weather.sun_t(nil, 1000, 2000) == nil, 'missing now gives nil') +assert(weather.sun_t(1500, nil, 2000) == nil, 'missing sunrise gives nil') + +-- is_day drives both the icon face and the dot's colour: a dot parked at the +-- end of the arc must not read as a sun that is still up. +assert(weather.is_day(1500, 1000, 2000) == true, 'midday is day') +assert(weather.is_day(1000, 1000, 2000) == true, 'sunrise counts as day') +assert(weather.is_day(2000, 1000, 2000) == true, 'sunset counts as day') +assert(weather.is_day(500, 1000, 2000) == false, 'before dawn is night') +assert(weather.is_day(2500, 1000, 2000) == false, 'after dusk is night') + print('test_weather: all assertions passed') |